save memory into backup ram

"[email protected] [rabbit-semi]" <[email protected]> 01 Sep 2016 11:53:49 -0700
Newsgroups gmane.comp.hardware.rabbit-semiconductor
Message-ID <[email protected]>
Hello, everybody:
 

 I have some parameters in BL4S200, user will change them from HMI, and I want to save this change, so program can use them after controller power on next time. I find bbram and protected, but I am not very clear how to use it? does anybody give me a sample for that?